Finding the Fourth Proportional to 85,885.34, 128,696.63 and 45,910.01

Step by Step Solution

1. Step 1: Write the proportion equation
   85,885.34 : 128,696.63 = 45,910.01 : x
2. Step 2: Convert to fraction form
   85,885.34/128,696.63 = 45,910.01/x
3. Step 3: Cross multiply
   85,885.34x = 128,696.63 × 45,910.01
4. Step 4: Simplify right side
   85,885.34x = 5,908,463,570.27
5. Step 5: Solve for x
   x = 5,908,463,570.27/85,885.34
6. Step 6: Final answer
   x = 68,794.79